Improvement in heating-stoves



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T. GEMMELL'. Heating-Stoves.

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Heating-Stoves.

No. 196,007. Patented Oct. 9, 1877.

V//AW/M/AW/Am LM/M] iwfm v N. PETERS. PHOTO LTMDGRAFHER wASHlNuTON c C UNITED ASTATES PATENT OFFICE.

THOMAS GEMMELL, OF BALTIMORE, MARYLAND.

IMPROVEMENT IN HEATING-STOVES.

Specification forming part of Letters Patent No. 196,007, dated October 9, 1877; application filed August 17, 1877.

To all whom t 'may concern:

Be it known that I, Tuoi/ms GET/mmm, of the city of Baltimore and State of Maryland, have invented certain Improvements in Heating-Stoves, of which the following is a specilication; and I do hereby declare that in the same is contained a full, clear, and exact description of my said invention, reference being `had to the accompanying drawing, and to the letters of reference marked thereon.

The first part of my invention has reference to certain improvements in that class of stoves wherein heat radiated from the fuel is stored up and gradually emitted in an equal and uniform manner from a casing composed mainly of terra-cotta, soap-stone, or other heat-retaining substance.

In the further description of the invention which follows, reference is made to the accompanying drawing, forming a part hereof, and in which- Figures I and II are, respectively, a vertical section and an exterior elevation of the improved stove.- Fig. III is a sectional plan of the invention. Figs. IV and V are sectional views of parts of the invention on an enlarged scale. Figs. VI, VII, VIH, IX, andX illustrate certain modifications in design of the stove. Figs. XI, XII, XIII, and XIV illustrate the preferred construction of the re-pot or lire-holder, which is shown on an enlarged scale.

Similar letters of reference indicate similar parts in all the figures.

A is the hollow base of the stove, containing the ash receptacle or pan B, and supporting the stove-body or outer casing. The said stove-body or outer casing consists of blocks, C, of terra-cotta, soap-stone, or other material having similar heat-retaining properties, conned within and by a metallic frame or skeleton formed of an upper and a lower metallic frame-plate or ring, (represented, respectively, by D and E.) The said rings or plates are connected by vertical metallic ribs F, having their outer edges iianged or beaded, so as to form shoulders, by means of which the blocks C are held in place.

A cover or lid, G, constructed, in like manner, of a block of terra-cotta or other similar heat-retaining substance, contained by a ring or frame of metal, is made either separate and removable, or preferably hinged to the stovebody or outer casing.

A close joint is formed between the stovecasing and the cover or lid, and between the casing and the hollow base, by means of gaskets a, of lead or other soft metal, or of asbestus felt or other compressible incombustible substance.

'Ihe gasket placed between the body and base of the stove is held in place bythe weight of the former; but, if desired, it may be secured in some suitable way to one of the parts.

The following description of the tire-pot or holder used in connection with this stove is given in order that the action of the stove may be the better understood; but the said fire-pot is not claimed as a part of the invention herein described, but may form the subject of a separate application for Letters Patent. rI he fire-pot or fire-holder H, containing the fuel, is placed centrally in the outer casing, resting upon the hollow base, and is separate and removable. The lire-pot is fitted with lugs or anges to assist in its withdrawal from, and its replacement in, the stovebody, and its bottom is perforated or divided by spaces for the admission of air. The body of the iire-pot is either made of sheet-iron, in which case it is lined with terra-cotta or fireclay, to prevent the burning and wasting of the metal, and perforated, or of wrought or cast iron bars, forming a frame-work adapted to hold terra-cotta or tire-brick in any desired form. The preferred construction of the lirepot is, however, as follows: To a perforated plate, forming the bottom or base, there are attached, by bolts or rivets, or by other suitable means, a series of vertical flan ged iron ribs or strips of sheet-iron, having their outer edges expanded or turned over, so as to forni a bead, head, or iiange. Blocks of terra-cotta or firebrick are inserted between the bars or sheetiron strips, and are held in place by the beads or flanges on the vertical sheet-metal strips or ribs before referred to. The upper ends of the sheet-metal strips or ribs are connected by a ring, which, to facilitate the lifting of the tirepot, is provided with lips, handles, or with a bail. The fire-brick blocks are preferably perforated, to admit of the direct radiation of heat from the fuel to the stove-body without interfering materially with the heat-retaining properties of the fire-pot. The stove is further provided with registers, to regulate the admission of air to the interior of the hollow base, and thence to the fire-pot, and with a smoke-pipe, to conduct the products of combustion to a chimney or flue.

Having thus described my invention, what I claim as new, and wish to secure by Letters Patent of the United States, is-

l. The combination of the base A of the stove, the body thereof consisting' of the terracotta or soap-stone blocks C, rings D and E, and frame-work F, and the lid formed of the' terra-cotta or soap-stone block G, having an 

